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The katG, inhA and ahpC genes, in 71 isoniazid (INH)-resistant and 26 INH-susceptible Mycobacterium tuberculosis isolates, from South Korea were examined by sequencing and MspI restriction enzyme analysis. Mutations in the katG 315 alone, katG 315 plus inhA, katG 315 plus ahpC, katG 309 alone, katG 309 plus inhA, inhA alone, and ahpC alone, were detected in 54.9, 2.8, 1.4, 1.4, 1.4, 19.7, and 5.6%...
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